gswap

Interchange two vectors.

Usage

var gswap = require( '@stdlib/blas/gswap' );

gswap( x, y )

Interchanges two vectors x and y.

var Float64Array = require( '@stdlib/array/float64' );
var array = require( '@stdlib/ndarray/array' );

var x = array( new Float64Array( [ 4.0, 2.0, -3.0, 5.0, -1.0 ] ) );
var y = array( new Float64Array( [ 2.0, 6.0, -1.0, -4.0, 8.0 ] ) );

gswap( x, y );

var xbuf = x.data;
// returns <Float64Array>[ 2.0, 6.0, -1.0, -4.0, 8.0 ]

var ybuf = y.data;
// returns <Float64Array>[ 4.0, 2.0, -3.0, 5.0, -1.0 ]

The function has the following parameters:

x: a 1-dimensional ndarray or an array-like object.
y: a 1-dimensional ndarray or an array-like object.

Notes

gswap() provides a higher-level interface to the BLAS level 1 function gswap.
In general, for best performance, especially for large vectors, provide 1-dimensional ndarrays whose underlying data type is either float64 or float32.

Examples

var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
var filledarrayBy = require( '@stdlib/array/filled-by' );
var gswap = require( '@stdlib/blas/gswap' );

var rand1 = discreteUniform( 0, 100 );
var x = filledarrayBy( 10, 'generic', rand1 );
console.log( x );

var rand2 = discreteUniform( 0, 10 );
var y = filledarrayBy( 10, 'generic', rand2 );
console.log( y );

gswap( x, y );
console.log( x );
console.log( y );